\documentclass[pdftex,nocopyrightspace]{sigplanconf}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{color}
\usepackage{url}
\usepackage{tikz}
\usetikzlibrary{automata, arrows}
\usepackage{multirow}
\usepackage{pifont}
\newcommand{\cross}{\hspace{1pt}\ding{55}}
\usepackage{textcomp}
\usepackage{caption}
\usepackage{subcaption}
% Package to generate and customize Algorithm as per ACM style
\usepackage[ruled,vlined]{algorithm2e}

\begin{document}
\input{abstract}

\end{document}

